Tandem cylinder glass plunger actuator



Aug. 20, 1935. E. MILLER TANDEM CYLINDER GLASS PLUNGER ACTUATOR Filed March 27, 1933 I @IiilwR-Jn mgl.

j fff A Gttorneg Bg @L being inally claimed.

Patented Aug. zo, i935 locurran srafres' cuece mreur OFFICE TANDEM CYLINDER GLASSPLUNGER' v ACiUA'ioia` Edward Miller, Columbus," VOhio,` assignor to Lynch Corporation, Anderson, Ind., a corporation oi Indiana Application March 27, 1933, Serial No; 662,867 n l15 claims. (ci. 49-38) according to lthe form, size and naturer of .the

ware to be produced.

" An object, generally, of the invention, therefore,

is to provide improved means'whereby the aforesaid variations in pressure may be easily, quickly,

conveniently and economically'controlled by preadjustmentj to vary the degree of pressure to be e;:erte d.L This object I accomplishby the employment of oneormore cylinders kvwith pistons` of different for varying capacity actuating the same plunger together with means whereby either or bothV of the cylinders .and pistons Vmay be operated. A further object is to providea cylinder Y lwith an adjustable head wherebythe capacity of the cylinderand the length of stroke ofthe piston therein can be varied. Another object is. to pro- IVide improved means whereby the length of the plunger can be adjusted and varied. Other objectsgwill appear from the disclosure herein.

The invention is embodied in the example herein. shown and described, the'features of novelty In'the accompanying drawing-'- .y Figure V1 is a View mainly in ',vertical se' with .parts in elevation. Y

tion,

" Figs. 2, Sand lare sectional views, on a larger scalethan 'appears'in Fig. 1, ofthe valve employed in the pressure line showing in broken vlinesfthe, plug operating handles in different positions for delivering to and exhausting pneumatic pressure from the cylinders and either of them.

Fig., 5jis a vertical sectional view,'on a larger scale, of the cushion or check valve forthe up stroke of the upper piston.

Y In" the' views A designatesthe upper cylinder .the lower head 9 of,l the cylinder B. f

andB ,theV lower cylinder, these being arranged in tandem. The cylinder A isof larger diameter `than cylinder B and' contains a'piston 6. The

cylinder B contains piston 'l and the two pistons fare Yconnected tomove in unison on a stem v'm common to the two pistons, said stem extending through head 8 common to the two cylinders-and vThe lower vend of the pistonI stem is internally Y `threaded to receive athreaded portion lil-of the plunger vl l to permitvertical adjustment of the plunger.h When adjusted the plunger iss'ecured in adjusted position by a nut l2 supplemented withva jam nut i3. Av4 guide for the plunger is provided by-means of bracket lll engagingA the stem and a parallel bar ,l fixed between an extension oflthe lowerfhead of cylinder B anda suitable stationary frame member i6.

. Suitable cushioning means for graduating lthe Ypressure of the plunger head is provided consisting of a bottom ring Il having vertical bolts i3 with encircling springs i9, a topy bar 2l) having passed andy top j-and vbottoni e. nuts 2l and 22 on the threaded plunger stem to permit setting ofthe bar 20 to predetermine the resistance to be Vafforded.bythesprings to thedescent of the plunger head on its downward stroke into the glass ofthe mold Bil as shown.`

,perforations .through which rthe bolts, i8 fare Pneumatic pressure is fed from steadypres- Y sure or compressor line'Z to the cylinders through an `ordinary spool or, slide valve 23, said `valve adapted to be shifted pneumatically by suitably timed means through pipes 24,24. The case of 'the spool valve is provided with exhaust ports 25.

Pipe line X has branches leading from the up- `per end vof valve 23.in `to `the upper ends of cylinders A and B; and pipe line Y has branches leading into the lower ends of. said cylinders A and B. The branches -of the pipe linesXjand Y are each provided'with a hand .operated threeway valve like that illustrated in Figs. 2, 3 and 4'. These three-way fvalves are .designated 30,36%,- in the branch lines of Xfandland 3|@` in the branch lines of Y.

. The operation is this: If both pistons are to be ,I 4operated thefthree-wayyalves are set asindicated Qin full lines Figs. 1. and 2 and the spool valve re- `ciprccated by the timer. The feed pressure is alternately through lines X and'Y to the cylin- ,ders` thereby reciprocating f the plunger. ybe noted that in this operation the exhaust is al- It `Will ternately through the lines X and Y andthe exlhaust ports 25 of the spool valve..`l

` YWhen the piston in the cylinder'A alone is to have operating ypressure applied thereto the y 4valves 3e and 3l are left as set. asinFig. V1, but

Valves 30a and Sla .aref moved to set vthemk as depictedin Fig; 3 thus leaving .the cylinder` A subjectV to pressure through the lines X and Y and .the cylinder B open .to the atmosphere and thus with intake from and exhaust directly through the valvesto the atmosphere upon the powerl reciprocations of the vpistonin cylinder A',

When the pistonfin cylinder B alone is to have e :operating pressure appliedlthereto" the Valvesv 30a and 3HE are restored as in Fig. 1', and thevalves 30 and 3l turned to the position indicated in Fig. 4 thereby admitting pressure to operate the piston in cylinder B and open the Cylinder A to the atmosphere through the exhaust port in said valves 3B and 3|.

In all three of these operations the cylinders or the cylinder receiving pressure exhausts through the Aexhausts 25 of the spool valve. In the last `two described :operationsthe idling cylinder exhausts through'the said three-way Valves in the branch pipe lines.

In the present construction the upper head 45 of the cylinder A is shown as adjustable by means of a screw Il@ engaging adjustable nuts 4l and 4 la on opposite sides of a cross 'bar 133 that is held on i This adj ustability of theV cylinder:vv

bolts 44,44. head permits varying the capacity of the cylinder A and limits the upward stroke of the plunger. IIhe said head 45 is shown as provided with a cavity'46 in its lower side from which extends a port 4l to a sub-branch pipe 43 connected with Y the branch X and in said sub-branch i3 is a Lunkenheimerbleeder check valve is provided with a small bleeder port 53 to permit cushioning of ,thev up-stroke of the piston.Y

In order that said `cylinder head 45With its connected pipes` may be adjusted up or dowir without removing the'pipes and by merely adjusting Athe nuts 4| and da there is interposed on the upper branch line of the pipe X a pair of short pipes 5I .and 5i hinged to each other and to the respective portions of saidbranch so that when saidhead is moved up or down the angular relation of said pipes 5l and4 5l to each other is merelyincreased', or diminished as the case may be Without materially affecting the flow loi air through said branch line.

v From the kforegoing itwill be observed that thev Vpressure to 'be exerted onthe plunger inpressing glass can be varied 'by operating either piston Vor both and also by changing the. capacity of cylinder A by adjusting its head to operate the piston therein either alone or in conjunction with that of cylinder B. n

The forms of the parts `can be changed'without departing ,from 'the gist of the invention as claimed. i'

What I claim isz, l l Y A1. In a glass forming machine, a plurality of ypneumatic cylinders witha piston in each of them, a'glass treating plunger actuatable by either orbothl of said pistons and means for conducting air underV pressure to either or both of said pistons at will. t

2. vIn aglass forming machine, a plurality of pneumatic cylinders with a pistonfin each of them, a glass treating plunger actuatable by either or both of said pistons and means for conducting air under pressure to either-or both of said pistons at will, said means including adjustable three-Way valves in said uid pressure conducting means. V Y K 3. In a glass forming machine, a plurality 0I pneumatic cylinders withV a piston in each oi.' them, anglass'ntreating plungeractuatalole by a valve betweenl said steady pressure line and said branch lines for shifting the pressure of the steady pressure line and means for controllingV the flow of .air under. pressure through said branch lines to either or both of said pistons at Will, said last named means including adjustable three-way valvesin said branch linesf l 4. In a glass forming machine, a duality of them, said pistons having astem common to them, means whereby air under pressure can be conducted to either of said pistons at will and means forvarying the stroke of the pistons in said cylinders` independently of the speed of .movement thereof. Y A

6. In a glass forming machine, a duality of cylinders with azpiston in each of them, said pistons having a stem common to them, an air pressure conductingl-i-ne whereby air under pressure can be conducted `to either of said Vpistons at will, onelof said lcylinders having an adjustable head-to vary the stroke of the piston, and a ilexiblemeansin the air pressure conducting line permitting adjustment of Vsaid cylinder head Without disturbing the conductivity of said line.

7. In Aa glassware making machine, va glass formingrplunger, a cylinder, Va piston therein for actuating said plunger, a fluid ypressure line for reciprocating said piston at will, said` cylinder having a head, a pressure conducting .sub-line connectedto said head, said sub-line provided with a'check valve and a bleeder port to cushion the stroke lof said piston-in .one direction. 8. In a glassworking machine, a glass pressing mechanism comprising a pressing plunger, pneuthe stroke of the plunger without varying the Y speed of. initial movementthereof.

9. In a glassworking machine, a glass pressin mechanism comprising a pressing plunger, pneumatically operated piston' and cylinder mechanism for reciprocating said plunger into and out of pressingposition including a plurality of cylinders connected in tandem, a piston in each cylinder connected to said plunger, and means for varying the stroke of said pressing plunger throughout a Widey range withoutl varying the speedvof initial movement of the plunger.

y 10. In a glassworking machine, a glass pressing mechanism comprising a pressing plunger, pneumatically `operated piston and4 cylinder Vmechanism for reciprocating said plunger into, and out 4of pressing position, said piston and cylinder mechanism including at least two separate cylinders, each having a piston connected to said plunger, and means for varying the vcapacity of the cylinder .to varythe stroke of the plunger vwithout, substantial alteration of the speed of initial movement of the plunger.

Y 1I. In a glass-working machine, a glass pressing mechanism comprising aV pressing plunger, pneumatically operated piston and cylinder mechanism for reciprocating said plunger into and out of pressing position, said piston and cylinder mechanism including at least two separate cylinders, each having a piston connected to said plunger, said cylinder comprising a cylindrical head slidably mounted within and in contact with the inner vwalls o said cylinder, and means for adjusting the position of the head with reference to the body of the cylinderV whereby the stroke of theV cylinder may be .adjusted throughout a wide range.` K

v12. In a glassworlring machine, in combination "with a mold, glass pressing mechanism for shaping the glass charges in a mold and including a plunger carrier and a plunger, said glass pressing mechanism being adjustableto press ware throughout a Wide range of sizes comprising an adjustable pneumatic cylinder -for adjusting the'V actuating stroke of the plunger, in approximate accordance with the size and shape of Warer to be produced, and means for adjusting the position of the plunger with reference to `the yplunger carrier in exact accordance With the size andV shape of Ware to be produced.

13. In a glassworking machine, in combination with a mold, glass pressing mechanism compricing a plungercarrier and a plunger, pneumatic cylinder and piston means for actuating the plunger carrier and plunger, means for adjusting the length and capacity of the cylinder to Vary the-stroke of the plunger in approximate accordance with the size and shape of Ware to ber produced Without varying the speed yor" movement of the plunger, said plunger being screwthreadedly carried bysaid plunger carrier Whereby the lower limits of plunger position may-be 'Avaried' in exact accordance with the size and shape ofthe ware.

i4. In a glasswcrking machine, a glass pressing A mechanism comprising a pressing plunger, pneumatically operated piston and cylinder mechanism for reciprocating said plunger into and out cordance with the size, shape and weight of WareY Y being produced.

15. In a glassworking machine, in combination' With a mold, glass pressing mechanism comprising a plunger carrier and a plunger, pneumatic Y cylinder and piston means for actuating the plunger carrier and plunger, means for adjustn ing the length and capacity of the cylinder t0 vary the stroke or the plunger in approximate accordance with the size and shape of Ware to be .produced without Varying the speedof movement of the plunger, said plunger being screwthread'edly carried by said plunger carrier Whereby the lower limits of plunger position may be Varied in exact accordance With the. size and shape of the Ware, andy meansfor optionally increasing or decreasing the pressure for actuating the plunger in accordance with the Weight of the Ware being produced. l Y. f

EDWARD MILLER. 

